You didn't mention what apps the menu has. I have a Nikon D40 and Nautilus shows me these for .NEF-files:
Document Viewer F-Spot GIMP gThumb and they all work for me, although Document Viewer cannot show anything else than the embedded thumbnail. Maybe you don't have dcraw installed? -- Camera RAW files open with wrong apps https://launchpad.net/bugs/91488 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
